Numerical Analysis on the Formation of Fracture Network during the Hydraulic Fracturing of Shale with Pre-Existing Fractures

doi:10.3390/en10060736

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院页岩气与地质工程重点实验室

	Numerical Analysis on the Formation of Fracture Network during the Hydraulic Fracturing of Shale with Pre-Existing Fractures
	He, Jianming 1,2; Zhang, Zhaobin 1; Li, Xiao 1,2
刊名	ENERGIES
	2017-06-01
卷号	10 期号:6
关键词	hydraulic fracturing shale reservoir fracture network pre-existing fracture boundary element method
ISSN号	1996-1073
DOI	10.3390/en10060736
文献子类	Article
英文摘要	In this paper, configurations of pre-existing fractures in cubic rock blocks were investigated and reconstructed for the modeling of experimental hydraulic fracturing. The fluid-rock coupling process of hydraulic fracturing was simulated based on the displacement discontinuities method. The numerical model was validated against the related laboratory experiments. The stimulated fracture configurations under different conditions can be clearly shown using the validated numerical model. First, a dominated fracture along the maximum principle stress direction is always formed when the stress difference is large enough. Second, there are less reopened pre-existing fractures, more newly formed fractures and less shear fractures with the increase of the cohesion value of pre-existing fractures. Third, the length of the stimulated shear fracture decreases rapidly with the increase of the friction coefficient, while the length of the tensile fracture has no correlation to the fiction coefficient. Finally, the increase of the fluid injection rate is favorable to the formation of a fracture network. The unfavorable effects of the large stress difference and the large cohesion of pre-existing fractures can be partly suppressed by an increase of the injection rate in the hydraulic fracturing treatment. The results of this paper are useful for understanding fracture propagation behaviors during the hydraulic fracturing of shale reservoirs with pre-existing fractures.
WOS关键词	ARBITRARY EVOLVING CRACKS ; MESHFREE METHOD ; PROPAGATION
WOS研究方向	Energy & Fuels
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000404384000002
资助机构	National Natural Science Foundation of China(41572310 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030301 ; 41227901) ; XDB10030304) ; National Natural Science Foundation of China(41572310 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030301 ; 41227901) ; XDB10030304) ; National Natural Science Foundation of China(41572310 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030301 ; 41227901) ; XDB10030304) ; National Natural Science Foundation of China(41572310 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030301 ; 41227901) ; XDB10030304)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/46059]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	He, Jianming
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	He, Jianming,Zhang, Zhaobin,Li, Xiao. Numerical Analysis on the Formation of Fracture Network during the Hydraulic Fracturing of Shale with Pre-Existing Fractures[J]. ENERGIES,2017,10(6).
APA	He, Jianming,Zhang, Zhaobin,&Li, Xiao.(2017).Numerical Analysis on the Formation of Fracture Network during the Hydraulic Fracturing of Shale with Pre-Existing Fractures.ENERGIES,10(6).
MLA	He, Jianming,et al."Numerical Analysis on the Formation of Fracture Network during the Hydraulic Fracturing of Shale with Pre-Existing Fractures".ENERGIES 10.6(2017).